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Stock Options and Awards (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 29, 2019
USD ($)
Plan
$ / shares
shares
Jun. 30, 2018
USD ($)
shares
Jun. 29, 2019
USD ($)
Plan
$ / shares
shares
Jun. 30, 2018
USD ($)
$ / shares
shares
Dec. 29, 2018
$ / shares
shares
Stock Options [Abstract]          
Number of plans that have shares reserved for further issuance | Plan 1   1    
Minimum [Member]          
Stock Options [Abstract]          
Percentage of fair market value of stock on grant date for exercise price     100.00%    
Stock Options [Member]          
Number of Units, Stock Appreciation Rights (SARs) [Roll Forward]          
Outstanding at beginning of period (in shares) | shares     25,000 25,000 25,000
Issued (in shares) | shares 0 0 0   0
Forfeited (in shares) | shares     0   0
Outstanding at end of period (in shares) | shares 25,000   25,000   25,000
Weighted - Average Exercise Price, Stock Appreciation Rights (SARs) [Abstract]          
Outstanding at beginning of period (in dollars per share)     $ 0 $ 0 $ 0
Issued (in dollars per share)     0   0
Forfeited (in dollars per share)     0   0
Outstanding at end of period (in dollars per share) $ 0   0   $ 0
SARs Grants Outstanding and Exercisable [Abstract]          
Maximum Range of Exercise Prices (in dollars per share)     $ 0    
Outstanding (in shares) | shares 25,000   25,000    
Weighted- Average Remaining Contractual Life     2 years 9 months 18 days    
Weighted- Average Exercise Price (in dollars per share) $ 0   $ 0    
Exercisable (in shares) | shares 0   0    
Exercisable, Weighted- Average Remaining Contractual life     0 years    
Exercisable, Weighted- Average Exercise Price (in dollars per share) $ 0   $ 0    
Stock Appreciation Rights (SARs) [Member]          
Stock Options [Abstract]          
Stock-based compensation expense | $ $ 93,000 $ 74,000 $ 173,000 $ 130,000  
Number of Units, Stock Appreciation Rights (SARs) [Roll Forward]          
Outstanding at beginning of period (in shares) | shares     189,167 141,500 141,500
Issued (in shares) | shares     36,000   51,000
Exercised (in shares) | shares     (1,667)   0
Forfeited (in shares) | shares     0   (3,333)
Outstanding at end of period (in shares) | shares 223,500   223,500   189,167
Weighted - Average Exercise Price, Stock Appreciation Rights (SARs) [Abstract]          
Outstanding at beginning of period (in dollars per share)     $ 21.46 $ 20.36 $ 20.36
Issued (in dollars per share)     26.30   24.90
Exercised (in dollars per share)     19.10   0
Forfeited (in dollars per share)     0   19.10
Outstanding at end of period (in dollars per share) $ 22.15   22.15   $ 21.46
SARs Grants Outstanding and Exercisable [Abstract]          
Minimum Range of Exercise Prices (in dollars per share)     19.10    
Maximum Range of Exercise Prices (in dollars per share)     $ 26.30    
Outstanding (in shares) | shares 223,500   223,500    
Weighted- Average Remaining Contractual Life     3 years 3 months 18 days    
Weighted- Average Exercise Price (in dollars per share) $ 22.15   $ 22.15    
Exercisable (in shares) | shares 38,003   38,003    
Exercisable, Weighted- Average Remaining Contractual life     2 years 8 months 12 days    
Exercisable, Weighted- Average Exercise Price (in dollars per share) $ 19.10   $ 19.10    
Restricted Stock [Member]          
Stock Options [Abstract]          
Issued (in shares) | shares 0 0      
Stock Options and SARs [Member]          
SARs Grants Outstanding and Exercisable [Abstract]          
Outstanding options, intrinsic value | $ $ 1,990,010   $ 1,990,010    
2010 Plan [Member]          
Stock Options [Abstract]          
Expected term     3 years 6 months 3 years 6 months  
Volatility deviation     28.88% 29.50%  
Risk free rate     2.48% 2.33%  
Shares available for future grant (in shares) | shares 238,500   238,500